If one strand of DNA has the following sequence: CGGCTAATCGCC, what would the sequence of the complimentary strand be?

GCCGATTAGCGG

Explanation:

Chargaff base pairing rule state that the ratio of purines to pyrimidine in a specific DNA from any cell or specie must be equal in 1:1 ratio. In chargaff base pairing rule Cytosine C will pair with Guanine G on the complementary strand and Adenine A will pair with Thymine T on the complementary strand. C=G, A=T

So if the sequence 5' CGGCTAATCGCC 3' on the complementary strand will be

3' GCCGATTAGCGG 5'

the fossil record provides evidence of a common ancestor to many species.